9results about How to "The test environment is stable" patented technology

This utility model relates to the field of cable testing technology, specifically a fire resistance testing device for fire-resistant cables. It includes a test platform with several lifting components fixedly mounted on it for adjusting the flame spray height. Each lifting component has a rotatable flame spray component mounted on it. A spring is installed between adjacent flame spray components. A gas supply pipe is connected to the rear end of each flame spray component. A fixing component is provided at the top of each lifting component. By setting up the lifting components, flame spray components, and fixing components, the lifting components drive the flame spray components and fixing components to move up and down synchronously, ensuring that each nozzle corresponds to a bent cable, guaranteeing uniform heating throughout the cable. This allows the test results to better reflect the cable's true fire resistance performance. Furthermore, when the cable shape needs to be changed, the cable shape can be altered by adjusting the height of each fixing component, eliminating the need to contact the cable or wait for it to cool down, thus improving testing safety and speed.

A metal plug clamping mechanism and testing device for charger firmness testing are disclosed. The clamping mechanism includes a clamping assembly and a transmission assembly. The clamping assembly has two clamping portions for contacting the inner surface of the metal plug. The transmission assembly connects the driving portion of the clamping assembly to a force gauge and is configured to convert the tensile force applied by the force gauge, parallel to the plug axis, into a force that drives the two clamping portions to move relative to each other in the radial direction and press against the plug, thereby achieving a self-locking effect of "the tighter it gets, the more it gets." This application solves the problems of unstable clamping and cumbersome operation in existing testing methods, and has the advantages of accurate and reliable test results, simple and fast operation, and simple structure. It can also be extended to the pull-out force testing of similar electronic ports such as USB interfaces.

This application relates to the field of high-temperature environment simulation testing technology, specifically, to a high-temperature performance testing device for large workpieces. The device includes a test chamber, a heating system, a temperature control system, a dehumidification circulation system, a workpiece placement structure, a grooved track, and a control cabinet. The control cabinet is located outside the test chamber; the heating system is located on the inner walls of both sides of the test chamber and connected to the control cabinet; the temperature control system is located inside the test chamber and connected to the control cabinet; the dehumidification circulation system is located on the outer wall of the test chamber and connected to the control cabinet; the grooved track is located on the bottom plate inside the test chamber; and the workpiece placement structure is located in the center of the test chamber and slides on the grooved track via directional wheels. This application can meet the need for simultaneous testing of multiple large workpieces, is suitable for high-temperature performance testing of large workpieces, and features a dehumidification circulation system that efficiently dehumidifies and dissipates heat to maintain a stable testing environment.

The utility model relates to a kind of fruit and vegetable production simulation device for indoor test, belong to agricultural technology field.It is integrated multiple planting module, respectively including fall vine type, hedge wall type, ground planting type and frame type / ridge type planting module, and equipped with ground module;Among them, various planting module uses simulation plant, is not influenced by seasonal environment, and the testing condition of sustainable observation agricultural robot, and each module can be flexibly adjusted, fully simulates real agricultural scene.The utility model provides stable test environment for agricultural robot, which is not affected by season, solves the problem of single and environmental dependence of traditional simulation device, and improves the comprehensiveness and reliability of robot test.

This invention provides a continuous testing device for the three-dimensional volumetric shrinkage characteristics of soil, belonging to the technical field of geotechnical testing equipment. It includes: a transparent outer casing to form a sealed testing space; a graduated inner measuring cylinder containing a polymer solution for measuring sample volume, which also has a weighing function; a sample placement rod with a hydrophobic coating sprayed on both the inside and outside of the testing space, and a lifting handle; the sample can be completely immersed in or pulled out of the polymer solution by adjusting its longitudinal position; a fixing ring for fixing the position of the sample placement rod; and a base for supporting the upper device. This invention features a simple structure, reliable performance, and high testing accuracy. The test data can more accurately reflect the shrinkage characteristics of the soil under test. If the transparent outer casing is connected to a temperature and humidity controller, the testing device can obtain the shrinkage characteristics of soil under different temperature and humidity environments without disturbing the soil, effectively reducing errors during the testing process and improving testing efficiency.

The utility model discloses a kind of composite film loudspeaker diaphragm deformation laser displacement detection instruments, belong to loudspeaker detection technical field, this kind of composite film loudspeaker diaphragm deformation laser displacement detection instrument, including patch area and detection area, track between the patch area and detection area is set to connect both, track is provided with conveying slider moving along track, bracket and clamp are installed on conveying slider to realize the fixation to diaphragm.By patching device on the surface of diaphragm pasting reflector, then diaphragm is conveyed backwards, until it is sent to detection area, and diaphragm pasted reflector has good reflectivity, so as to effectively reflect when being detected by deformation laser displacement detection instrument, improve the accuracy of detection;Polarization platform is used to isolate vibration in environment, so as to avoid vibration in environment to influence diaphragm test, guarantee the accuracy of diaphragm test;Protective cover is used to protect internal components, and reduce the reflection of test laser in external environment.

This invention discloses a high-precision mechanical parts testing device, belonging to the field of parts testing technology. Its key technical features include a support platform with two rotatably connected support rollers. Annular protective plates, coaxial with the support rollers, are fixedly installed on both ends of the support rollers. A recessed frame is fixedly installed on the top of the annular protective plates. A first electrically operated telescopic rod, penetrating the recessed frame, is fixedly installed at the center of the top of the recessed frame. A hollow connecting column is fixedly installed at the output end of the first electrically operated telescopic rod. This invention applies vertical and horizontal bidirectional pressure to the sample through a hollow concave pressure block and a retractable airbag, achieving reliable fixation and effectively preventing sample slippage or breakage during testing. Simultaneously, the hollow protective shell, the retractable protective shell, and the magnetic locking structure form a sealed protective space during testing, completely isolating the testing area and preventing high-speed fragmentation or accidental sample slippage when parts break, significantly improving operational safety.

The utility model discloses a kind of OTA performance test high-low temperature rotary table devices of phase center self-stabilization, including rotating base mechanism, rotary table support, pitch adjustment mechanism, translation adjustment mechanism, wave-through heat preservation cover and temperature control equipment, through the accurate adjustment of translation adjustment mechanism, drive measured piece translation before and after, make the physical center of measured piece and the rotating shaft of rotating base mechanism concentric;Since the rotating shaft of rotating base mechanism and the darkroom quiet zone center accurate alignment, and the center mark line of wave-through heat preservation cover and the quiet zone center alignment, finally realize the rotation center of measured piece and phase center coincide, effectively avoid the test error caused by eccentric, by temperature control equipment generates high-low temperature gas, realize temperature isolation of temperature control area and normal temperature area, satisfy the full temperature zone OTA performance test demand of measured piece.

This application relates to the fields of fire science and materials safety technology, and discloses a device and method for testing the smoldering characteristics of pipe insulation layers impregnated with organic materials. The device includes a first pipe body, a heating device, an insulation layer, a conveying device, a temperature acquisition module, an image acquisition module, and a data processing device. The first pipe body has an inner cavity, the heating device is disposed within the inner cavity, and the insulation layer is connected to the outer wall of the first pipe body. The conveying device includes a conveying pipe disposed on the outer wall of the first pipe body. The temperature acquisition module acquires temperature information, and the image acquisition module acquires image information. The data processing device is electrically connected to the heating device, the conveying device, the temperature acquisition module, and the image acquisition module, and outputs the smoldering characteristic parameters of the organic material to be tested. The device and method for testing the smoldering characteristics of pipe insulation layers impregnated with organic materials disclosed in this application solves or improves the problem of being unable to simulate the smoldering characteristic testing of insulation layers covering the curved surface of hot pipes and impregnated with different organic materials.